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Chapter 10: Q78E. (page 592)
What is the coordination number of an aluminum atom in the face-centered cubic structure of aluminum?
\(12\) is the Coordination number of an aluminum atom
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Identify two common observations indicating some liquids have sufficient vapor pressures to noticeably evaporate.
Explain why the molar enthalpies of vaporization of the following substances increase in the order \({\rm{C}}{{\rm{H}}_{\rm{4}}}{\rm{ < }}{{\rm{C}}_{\rm{2}}}{{\rm{H}}_{\rm{6}}}{\rm{ < }}{{\rm{C}}_{\rm{3}}}{{\rm{H}}_{\rm{8}}}\), even though the type of IMF (dispersion) is the same.
Substance B is hard, does not conduct electricity, and melts at\({\rm{1200 ^\circ C}}\). Substance B is likely a(n): (a) ionic solid (b) metallic solid (c) molecular solid (d) covalent network solid
Explain why a hydrogen bond between two water molecules is weaker than a hydrogen bond between two hydrogen fluoride molecules.
From the phase diagram for carbon dioxide determine the state of CO2 at:
\(\begin{aligned}{\left( {\rm{a}} \right){\rm{ 20 ^\circ C and 1000 kPa}}}\\{\left( {\rm{b}} \right){\rm{ 10 ^\circ C and 2000 kPa}}}\\{\left( {\rm{c}} \right){\rm{ 10 ^\circ C and 100 kPa}}}\\{\left( {\rm{d}} \right){\rm{ - 40 ^\circ C and 500 kPa}}}\\{\left( {\rm{e}} \right){\rm{ - 80 ^\circ C and 1500 kPa}}}\\{\left( {\rm{f}} \right){\rm{ - 80 ^\circ C and 10 kPa}}}\end{aligned}\)
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